Search online using the Contra Costa County Sheriff’s Office Inmate Locator.

Or, call the Contra Costa jails for information about incarcerated people:

• Martinez Detention Facility (MDF): 925-335-4600

• West County Detention Facility (WCDF): 510-262-4200

• Marsh Creek Detention Facility (MCDF): 925-646-5700

• Custody Alternative Facility (CAF): 925-313-4260